Warning device

Abstract

To make a person recognize the presence of an opening of a hole formed in a floor or a ground surface.SOLUTION: A warning device 10 comprises: a switch 30 for outputting a signal in accordance with opening and closing of a lid 3 which opens and closes an opening portion 2a of a hole 2 formed in a ground surface 1; a warning lamp 51 that makes a person recognize a position of the opening portion 2a; and a controller 20 that controls turning on and off the warning lamp 51. The controller 20 turns on the warning lamp 51 when a signal output from the switch 30 is a signal corresponding to the opening of the lid 3.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a warning device.

Background Art

[0002] Patent Document 1 discloses covering an inspection port with a manhole cover.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the invention disclosed in Patent Document 1, when a person is inspecting by opening the manhole cover, passersby may not notice that the manhole cover is open and may trip over the opening of the inspection port or even fall into the inspection port.

[0005] An object of the present invention is to provide a warning device that can recognize the presence of an opening of a hole formed in a floor or the ground.

Means for Solving the Problems

[0006] The present invention includes a detector that outputs a signal corresponding to the opening and closing of a lid that opens and closes an opening of a hole formed in a floor or the ground, a warning lamp that recognizes the position of the opening, and a control device that controls the lighting and extinguishing of the warning lamp. When the signal output from the detector is a signal corresponding to the opening of the lid, the control device lights the warning lamp The detector outputs a signal corresponding to the lid being closed, even if part of the opening is not closed by the lid. on.

Advantages of the Invention

[0007] According to the present invention, the presence of an opening of a hole formed in a floor or the ground can be recognized.

Brief Description of the Drawings

[0008] [Figure 1] This is a cross-sectional view of a shaft in which the warning device of this embodiment is installed. [Figure 2] This is a block diagram of the warning device of this embodiment. [Modes for carrying out the invention]

[0009] Embodiments of the present invention will be described below with reference to the attached drawings.

[0010] The warning device 10 of this embodiment is applied, for example, to holes (openings) provided in floor slabs at building construction sites. Holes (openings) provided in floor slabs are used for loading and unloading materials and for workers to enter and exit. These holes (openings) are normally closed with lids to prevent workers from falling in, but the lids are opened when loading and unloading materials or when workers are entering and exiting through the holes (openings). The warning device 10 is used to make people passing around the holes (openings) or people working around them aware that the lids are open.

[0011] As shown in Figure 1, the hole 2 formed in the floor slab (hereinafter simply referred to as "floor") 1 at a building construction site, etc., has its upper opening 2a covered by a lid 3. The hole 2 is formed in a circular or rectangular cross-section, and its inner surface is lined with concrete.

[0012] As shown in Figure 1, multiple ladders 4 are provided vertically on the inner wall of the hole 2 for workers to ascend and descend. The hole 2 is normally closed by a cover 3. When a worker needs to work inside the hole 2, they open the cover 3 and use the ladders 4 to enter the hole 2.

[0013] By the way, while workers are working inside hole 2 or loading / unloading materials from hole 2, the lid 3 remains open. In this case, for example, if a worker (person) working on the ground is working near hole 2 without realizing that the lid 3 is open, there is a risk that the worker may trip over hole 2 or fall into hole 2. Therefore, in this embodiment, a warning device 10 is provided to make workers working around the opening 2a of hole 2 or workers passing around hole 2 aware that the lid 3 is open. The configuration of the warning device 10 will be described in detail below.

[0014] As shown in Figures 1 and 2, the warning device 10 includes a switch 30 (detector) that outputs a signal corresponding to the opening and closing of the lid 3, a warning light 51, a display device 52, a rotating light 53, a speaker 54, a camera 55, an oxygen concentration meter 56, a controller 20, a battery 40, and a communication device 60. The switch 30 corresponds to the "detector" in the claims, the display device 52, the rotating light 53, and the speaker 54 correspond to the "alarm device" in the claims, the camera 55 corresponds to the "imaging device" in the claims, and the controller 20 corresponds to the "control device" in the claims.

[0015] Switch 30 is a normally closed magnetic switch. Switch 30 has a magnet 30a attached to the lid 3 and a reed switch 30b attached near the opening 2a of the hole 2 at a position opposite to the magnet 30a. When the magnet 30a and the reed switch 30b are close together, that is, when the lid 3 is closing the opening 2a of the hole 2 (as shown in Figure 1), the reed switch 30b is OFF. Conversely, when the magnet 30a and the reed switch 30b are separated, that is, when the lid 3 is open, the reed switch 30b is ON. In this way, the reed switch 30b outputs a signal corresponding to the opening and closing of the lid 3. The signal from the reed switch 30b is transmitted to the controller 20 (see Figure 2). Note that the detector that outputs a signal corresponding to the opening and closing of the lid 3 is not limited to switch 30, but may be other types of switches or sensors.

[0016] As shown in Figure 1, the warning light 51 is composed of a strip-shaped LED tape light in which multiple LED lights 51a are mounted at predetermined intervals and wires are provided to electrically connect the multiple LED lights 51a. The warning light 51 (LED tape light) is attached by adhesive tape so as to encircle the inner surface of the opening 2a of the hole 2.

[0017] As shown in Figure 1, the display device 52 is installed near the opening 2a of the hole 2 in the floor 1. The display device 52 displays a predetermined message in response to instructions from the controller 20. The display device 52 is configured, for example, as an electronic display board.

[0018] As shown in Figure 1, the rotating light 53 is installed near the opening 2a of the hole 2 in the floor 1. The rotating light 53 turns on its light source and rotates its reflector in response to instructions from the controller 20.

[0019] As shown in Figure 1, the speaker 54 is installed near the opening 2a of the hole 2 in the floor 1. The speaker 54 emits a predetermined voice or alarm sound in response to instructions from the controller 20.

[0020] As shown in FIG. 1, the camera 55 is provided near the opening 2a on the upper end side inside the hole 2. The camera 55 images the worker entering and leaving the hole 2. The imaging data captured by the camera 55 is transmitted to a management server 70 (see FIG. 2) installed in an external management facility or the like through the communication device 60.

[0021] As shown in FIG. 1, the oxygen concentration meter 56 is provided on the lower end side of the hole 2. The oxygen concentration meter 56 measures the oxygen concentration inside the hole 2. The oxygen concentration measured by the oxygen concentration meter 56 is transmitted to the controller 20.

[0022] The controller 20 is composed of a microcomputer. Signals or data from the switch 30, the camera 55, and the oxygen concentration meter 56 are input to the controller 20. The controller 20 controls the operations of the warning lamp 51, the display device 52, the rotating lamp 53, and the speaker 54 based on the signals or data input from the switch 30, the camera 55, and the oxygen concentration meter 56.

[0023] The battery 40 is composed of a secondary battery such as a dry battery, for example. The battery 40 functions as a power source for driving the controller 20 and a power source for lighting the warning lamp 51. Note that the display device 52, the rotating lamp 53, and the speaker 54 are driven by a power source outside the hole 2.

[0024] As shown in FIG. 1, in this embodiment, the controller 20, the battery 40, and the communication device 60 are housed in one case 5. The case 5 has a hook 6 on the upper part. The case 5 is detachably attached to the tarp 4 by hooking the hook 6 on the tarp 4.

[0025] Next, a specific warning method of the warning device 10 will be described.

[0026] First, when the opening 2a of hole 2 is closed by the cover 3 shown in Figure 1, the magnet 30a and the reed switch 30b are in close proximity, and as described above, the reed switch 30b is OFF. In this state, the warning light 51, display device 52, rotating light 53, speaker 54, and camera 55 are all OFF (off or stopped).

[0027] When the worker opens the cover 3, the magnet 30a and the reed switch 30b separate, and the reed switch 30b turns ON. When the controller 20 receives an ON signal from the reed switch 30b, it activates the warning light 51, the display device 52, the rotating light 53, the speaker 54, and the camera 55. Specifically, the controller 20 illuminates the LED light 51a of the warning light 51. While the cover 3 is open, the controller 20 either keeps the LED light 51a constantly lit or flashes it in a predetermined pattern.

[0028] Furthermore, when the controller 20 receives an ON signal from the reed switch 30b, it causes the display device 52 to display a predetermined message. The message to be displayed can be anything that makes workers around the hole 2 aware that the lid 3 is open, that is, the existence of the opening 2a of the hole 2. Specifically, it could be something like "Lid is open," "Danger," or "Caution." Note that the message is not limited to such direct expressions, but may also be indirect, for example, "Work in progress."

[0029] Furthermore, when the controller 20 receives an ON signal from the reed switch 30b, it activates the rotating light 53.

[0030] Furthermore, when the controller 20 receives an ON signal from the reed switch 30b, it outputs a predetermined message or warning sound from the speaker 54. The message output from the speaker 54 is the same as the message displayed on the display device 52.

[0031] Furthermore, when the controller 20 receives an ON signal from the reed switch 30b, it turns on the camera 55. This causes the camera 55 to start imaging workers entering and exiting the hole 2. As described above, the data captured by the camera 55 is transmitted to the management server 70 (see Figure 2) via the communication device 60. Based on the data captured by the camera 55, the management server 70 identifies the workers entering and exiting the hole 2 and stores the workers' names, the times they entered and exited the hole 2, etc. Note that the image data captured by the camera 55 stored in the management server 70 is not limited to this and can be used as appropriate. Alternatively, the image data captured by the camera 55 may be stored on a storage medium such as a hard disk or SD card installed in the camera 55 instead of being transmitted to the management server 70.

[0032] When the controller 20 receives an ON signal from the reed switch 30b, it activates the oxygen concentration meter 56. The oxygen concentration data measured by the oxygen concentration meter 56 is transmitted to the controller 20. The controller 20 changes the lighting pattern and color pattern of the LED light 51a of the warning light 51 according to the oxygen concentration measured by the oxygen concentration meter 56. This allows the oxygen concentration inside hole 2 to be recognized from outside hole 2, so that safety inside hole 2 can be confirmed before working inside hole 2.

[0033] On the other hand, when the worker closes the cover 3, the magnet 30a and the reed switch 30b come into close proximity, causing the reed switch 30b to turn OFF as described above. When the controller 20 receives an OFF signal from the reed switch 30b, it stops the operation of the warning light 51, display device 52, rotating light 53, speaker 54, and camera 55.

[0034] As described above, in the warning device 10 of this embodiment, when a worker opens the cover 3, the warning light 51, display device 52, rotating light 53, and speaker 54 are activated. This allows workers passing around the hole 2 or working around the hole 2 to recognize that the cover 3 covering the hole 2 is open and to be aware of the existence (location) of the opening 2a of the hole 2. Therefore, it is possible to prevent workers from tripping over the hole 2 or falling into the hole 2.

[0035] In the above embodiment, the warning light 51 was described as being composed of an LED strip light. However, the warning light 51 can be of any type as long as it is capable of emitting light. Furthermore, the warning light 51 only needs to be able to recognize the existence (location) and shape of the opening 2a, and does not necessarily need to be installed around the inner circumference of the opening 2a of the hole 2.

[0036] Furthermore, the display device 52, rotating light 53, speaker 54, camera 55, and communication device 60 are not essential components of the warning device 10. These may be omitted as needed.

[0037] In the above embodiment, a hole 2 formed in a floor slab at a building construction site or the like was described as an example of a hole to which the warning device 10 is applied, but the hole to which the warning device 10 is applied is not limited to this. The warning device 10 can also be applied to holes located outdoors or in the floor of a building. Specifically, the warning device 10 may be applied to holes such as inspection hatches formed in the floor of a building, or to manholes formed in the ground. Furthermore, the size of the hole does not necessarily have to be large enough for a person to enter; it is sufficient if the hole is large enough that a person may trip over it if the cover 3 is open.

[0038] Furthermore, although the above embodiment describes a configuration in which the case 5 is hooked onto the ladder 4 by a hook 6, the configuration is not limited to this, and the case 5 may be fixed to the inner wall of the hole 2. Alternatively, the case 5 (controller 20) may be installed outside the hole 2 if it is possible to connect the reed switch 30b and the controller 20 with the lid 3 closed.

[0039] Furthermore, the switch 30 may also be configured to turn OFF the reed switch 30b, that is, to output a signal corresponding to the closing of the cover 3, even if a portion of the opening 2a of the hole 2 is not closed by the cover 3, in other words, if a portion of the opening 2a is open enough that a worker does not trip or fall in. Such a configuration can be achieved, for example, by increasing the magnetic force of the magnet 30a or by making the magnet 30a larger.

[0040] The warning device 10 configured as described above will produce the following effects.

[0041] In the warning device 10, the controller 20 (control device) illuminates the warning light 51 when the signal output from the switch 30 (detector) corresponds to the opening of the cover 3. This allows workers passing around the hole 2 or working around the hole 2 to recognize that the cover 3 covering the hole 2 is open and to be aware of the location of the opening 2a of the hole 2. Therefore, it is possible to prevent workers from tripping over the hole 2 or falling into the hole 2.

[0042] In the warning device 10, the controller 20 (control device) activates the display device 52, the rotating light 53, and the speaker 54 when the signal output from the switch 30 (detector) corresponds to the opening of the cover 3. This allows workers passing around the hole 2 or working around the hole 2 to more reliably recognize that the cover 3 covering the hole 2 is open and to recognize the location of the opening 2a of the hole 2.

[0043] In the warning device 10, the warning light 51 (LED strip light) is attached to the inner surface of the opening 2a of the hole 2 by adhesive tape, and the controller 20 (control device) is detachably attached to the ladder 4 for lifting and lowering, which is installed inside the hole 2. This allows the warning light 51 (LED strip light) and the controller 20 (control device) to be easily installed or removed.

[0044] In the warning device 10, the controller 20 (control device) changes the illumination pattern of the warning light 51 according to the magnitude of the oxygen concentration measured by the oxygen concentration meter 56 when the signal output from the switch 30 (detector) corresponds to the opening of the lid 3. This allows the oxygen concentration inside the hole 2 to be recognized from outside the hole 2, so that the safety inside the hole 2 can be confirmed before working inside the hole 2.

[0045] Although embodiments of the present invention have been described above, these embodiments only represent a part of the application examples of the present invention, and are not intended to limit the technical scope of the present invention to the specific configurations of the above embodiments. [Explanation of Symbols]

[0046] 1...Floor, 2...Shaft (hole), 2a...Opening, 3...Cover, 4...Ladder, 5...Case, 6...Hook, 10...Warning device, 20...Controller (control device), 30...Switch (detector), 30a...Magnet, 30b...Reed switch, 40...Battery, 51...Warning light, 51a...LED light, 52...Display device (alarm device), 53...Rotating light (alarm device), 54...Speaker (alarm device), 55...Camera (imaging device), 56...Oxygen concentration meter, 60...Communication device, 70...Management server

Claims

1. A detector that outputs a signal corresponding to the opening and closing of a lid that opens and closes an opening in a hole formed in the floor or ground, A warning light that indicates the position of the aforementioned opening, The system includes a control device that controls the illumination and extinguishing of the warning light, The control device illuminates the warning light when the signal output from the detector corresponds to the opening of the lid. The detector outputs a signal corresponding to the closing of the lid, even if a portion of the opening is not closed by the lid. Warning device.

2. A warning device according to claim 1, The alarm device provided outside the aforementioned hole is further provided, The control device activates the alarm device if the signal output from the detector corresponds to the opening of the lid. Warning device.

3. A warning device according to claim 1, The control device is detachably attached to a ladder for lifting and lowering, which is installed inside the hole. Warning device.

4. A warning device according to claim 1, The facility further comprises an imaging device provided near the opening inside the hole for imaging the inside of the hole, The control device, when the signal output from the detector corresponds to the opening of the lid, causes the imaging device to image the inside of the hole. Warning device.

5. A warning device according to claim 4, The control device and the management server are further provided with a communication device that communicates between them. The control device transmits the image data captured by the imaging device to the management server via the communication device. The management server identifies the person who entered or exited the opening based on the imaging data received from the control device. Warning device.

6. A warning device according to claim 1, The system further includes an oxygen concentration meter for measuring the oxygen concentration inside the aforementioned hole, The control device, when the signal output from the detector corresponds to the opening of the lid, changes the illumination pattern of the warning light according to the magnitude of the oxygen concentration measured by the oxygen concentration meter. Warning device.

7. A warning device according to any one of claims 1 to 6, The warning light is mounted so as to encircle the inner surface of the opening. Warning device.

Images